Java 8 List into Map

Question

I want to translate a List of objects into a Map using Java 8\'s streams and lambdas.

This is how I would write it in Java 7 and below.

private Map&l         


        

Answer 1

If your key is NOT guaranteed to be unique for all elements in the list, you should convert it to a Map> instead of a Map

Map> result =
 choices.stream().collect(Collectors.groupingBy(Choice::getName));